Server/client with HttpURLConnection

Question

Hi,
i need some help because i haven't dealt with java networking in the past.
The scenario is:
The client sends a string to the server via HTTP protocol (with use of the HttpURLConnection class). The server then sends to the client the reverse of the string the client sent, using again the HTTP protocol.
Could you please provide me with some reference or examples?
thank you in advance,
Ferdy

Answer 1

NB. This is almost pseudocode.
Server Side:
public class ReverseServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        resp.getWriter().println(StringUtils.reverse(req.getParameter("in")));
Client Side:
           HttpURLConnection connection =
                (HttpURLConnection) new URL(
                        "http://server:port/webapp/reverseServlet").openConnection();
        connection.setRequestMethod("HEAD");
        connection.setRequestProperty("in", "string to reverse");
        connection.connect();
        OutputStream outputStream = connection.getOutputStream();
        // read the result
        connection.disconnect();